Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ES2-SX-OPT AN found under Plug In Unit Electrical Electron by Fluke Electronics Corp. The National Stock Number assigned to this part is 6625015626741, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ES2-SX-OPT AN.